Molding apparatus.



P. WOLFE & A. JIGBR. MOLDING APPARATUS.

APPLICATION FILED MAE. 3, 1913.

1,095,764. Patented May 5,1914.

COLUMBIA PLANOGRAPH cm. WASHINGTON. n. c,

UNITED STATES PATENT. 0FFIE I PAUL WOLFE AND AUGUST JAGER, 0F HANOVER, GERMANY, ASSIGNORS TO THE FIRM OF GEBBUDER KORTING, AKTIENGESELLSCHLAFT, 0F LINDEN, NEAR HANOVER, i

GERMANY.

MOLDING APPARATUS.

Specification of Letters Patent.

Patented Ma 5, 1914:.

Application filed March 3, 1913. Serial No. 751,822.

To all whom it may concern:

Be it known that we, PAUL WVoLrr and AUGUST J Kenn, subjects of the German Emperor, residing at Hanover, Germany, have invented certain new and useful Improvements in Molding Apparatus, of which the following is a specification.

This invention relates to the manufacture of radiators composed of hollow multiple columnar elements which elements are interconnected by transverse branches or nipples. Each radiator element embodies two or more hollow columnar parts which are arranged in a plane transverse to the cross connection forming part of the inlet or outlet chamber and forming the radiating surface of the ducts oining said inlet and outlet chambers.

The method adopted in accordance with the present invention is to employ at least three superposed molding flasks so arranged that the intermediate flask receives the mold for the two adjacent halves and the connecting pieces for twoadjacent multiple columnar radiator elements. This arrangement may be multiplied as desired to produce any desired number of radiator elements alongside one another and in a single casting.

The novel feature of the present invention resides in the means used for producing the mold, so that the casting of such a plurality of multiple column elements in one casting may be eflected reliably in ordinary molding machines and without special care and apparatus.

The invent-ion and the method of carrying out the same in practice will be readily understood from the following description of one form as applied by way of example to a two element radiator and as illustrated in the accompanying drawings.

In these drawings Figure 1, shows a section through three superposed flasks, with the columnar parts of the radiator in cross section and the sand removed to disclose a cross branch and Fig. 2, is a view partly in section of two adjacent pattern plates for an intermediate flask. Fig. 3 is a view similar to Fig. 2 of a modified form of pattern plate.

In the drawing the broken lines A. B. C denote the planes where the various halves of the pat-terns meet.

A multiple column radiator element g, as illustrated is composed of interconnected ollow columnar parts 6, and the cross connection or nipple n. The upper extremity of the columnar parts 6, may also open into a similar transverse connection n. Thus a radiator element is composed of the parts above or below the dotted lines Bin Fig. 1. The mold say for one-half of the radiator element 7", is first prepared inthe lower flask a, and the pattern used in making this mold carries the core prints for the cores of the cross connection. The cores for the hollow columnar parts (Z, are also inserted in the usual manner. The center flask b, which is exactly equal in depth to the width of a radiator element, then receives on its opposite faces the impression or mold of the two adjacent half elements on each side of the dotted center line B. The two half patterns impressed from opposite sides in the center flask I), meet at this line B so that the complete outer contour of adjacent halves of adjacent element, is obtained in this intermediate flask b. The contiguous facesof the patterns at the plane 'B are so arranged as to give complete separation of th sand so as to prevent as..far as possible the formation of a ridge o-r groove. To this end 1 1 the two pattern halves 72, and j are made tubular at 70. These tubular parts constitute transverse openings to the plane of contact of the two halves and provide passages for the escape of sand displaced from the molding flask during the pressing in of the opposite pattern halves. Sharp definition at the contacting plane may be secured by causing the pattern halves to telescope as at m, Fig. 2, while the actual contacting face is beveled. In Fig. 3, it" indicates the upper pattern half, and j indicates the lower pattern half. In this form of the invention the pattern halves are formed with alined openings to form a continuous opening 7:", extending through the pat-tern halves when the parts are assembled. The meetingedges section j is placed on the lower base plate j within the flask, and then the sand is packed around the pattern, any excess material falling through the center opening. Then the upper pattern section is lowered which packs the sand into a compact mass, the excess material being forced out between the meeting ends of the pattern sections and falling through the center opening. Referring to Fig. 2, it will be seen that as the upper pattern section is lowered, the sand will be jammed by the beveled faces, and any excess will be forced out between the two telescopic sections. The sand is necessarily fine, and it will readily pass between the telescopic parts. In the form of the invention shown in Fig. 3, it is evident that when the upper pattern section is lowered, the excess sand will be forced out from between the sections, which is a somewhat simpler form of construction for carrying out the function of the improvement. In either Fig. l or Fig. 2, the upper plate j is brought down on the upper pattern section to smooth the top of the mass of sand.

lVe claim 2- 1. Means for molding multiple columnar radiator elements comprising a molding flask equal in depth to the width of a radiator element, two multiple column radiator pattern parts representing adjacent halves of adjacent elements and contacting faces on said patterns to meet about the center of said flask, each of said pattern part-s having an opening, whereby when the two pattern parts are placed together a continuous opening is formed to provide a passage for dis placed sand when forming the mold.

2. Means for molding multiple columnar radiator elements comprising a molding flask equal in depth to the width of a radiator element, two multiple column radiator pattern parts representing adjacent halves of adjacent elements and contacting faces on said patterns to meet about the center of said flask, each of said pattern parts having an opening, the inner edge walls of the opsnings being sharply beveled, the openings forming a continuous passage for displaced sand when the pattern parts are assembled and a mold is being formed.

3. Means for molding multiple columnar radiator elements comprising a molding flask equal in depth to the width of a radiator element, two multiple column radiator pattern parts representing adjacent halves of adjacent elements and contacting faces on said patterns to meet about the center of said flask, each pattern part having a hollow extension beveled at its edge and telescoping one within the other, the hollow extensions forming a continuous opening for displaced sand when the pattern parts are assembled and a mold is being formed.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

PAUL lVOLFF. AUGUST JAGER. Witnesses:

ALBERT H. Mnonunow, MARIE BEI-INE.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

